{"id":1365,"date":"2026-07-28T21:59:23","date_gmt":"2026-07-28T13:59:23","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?p=1365"},"modified":"2026-08-14T08:17:27","modified_gmt":"2026-08-14T00:17:27","slug":"hpeg-2400-polycarboxylate-superplasticizer-monomer","status":"publish","type":"post","link":"https:\/\/bastone-petrochem.com\/es\/hpeg-2400-polycarboxylate-superplasticizer-monomer\/","title":{"rendered":"\u00bfQu\u00e9 es el mon\u00f3mero de superplastificante de policarboxilato HPEG 2400?"},"content":{"rendered":"

El 2400 en HPEG 2400 es una cifra nominal, no una medici\u00f3n. La l\u00ednea que fija la cadena lateral es el valor de hidroxilo, y en las especificaciones comerciales publicadas abarca una banda de aproximadamente 18% de ancho.<\/p>\n\n\n\n

HPEG 2400 es \u00e9ter polioxietil\u00e9nico de alcohol met\u00e1lico: un doble enlace polimerizable en la cabeza, aproximadamente 53 unidades de \u00f3xido de etileno detr\u00e1s de \u00e9l, enviado como escamas de color blanco a amarillento.<\/p>\n\n\n\n

La dosificaci\u00f3n, la temperatura del reactor y la sensibilidad a la arcilla en el superplastificante terminado se deciden mucho antes de que una planta de concreto vea algo.<\/p>\n\n\n\n

Qu\u00e9 es HPEG 2400 a nivel molecular<\/h2>\n\n\n\n

HPEG 2400 lleva un doble enlace carbono-carbono polimerizable y un hidroxilo terminal por mol\u00e9cula. CAS 62601-60-9, aproximadamente 53 unidades de \u00f3xido de etileno crecidas sobre un iniciador de alcohol met\u00e1lico.<\/p>\n\n\n\n

\"Estructura<\/figure>\n\n\n\n

Grados comerciales de macromon\u00f3meros de poli\u00e9ter<\/a> divididos en tres familias: \u00e9ster de metacrilato (MPEG), \u00e9ter de isoprenilo (IPEG y TPEG) y \u00e9ter de metilo, que es donde se encuentra HPEG. La revisi\u00f3n de Xinyi Li de 2023 llam\u00f3 a HPEG-PCE la opci\u00f3n dominante, por efectividad de dosificaci\u00f3n y facilidad de preparaci\u00f3n.<\/p>\n\n\n\n

El doble enlace decide cu\u00e1nto macromon\u00f3mero entra en la cadena principal; la cadena de \u00f3xido de etileno decide qu\u00e9 hace el pol\u00edmero de peine terminado sobre el cemento.<\/p>\n\n\n\n

Qu\u00e9 controlan los n\u00fameros de la especificaci\u00f3n de HPEG 2400<\/h2>\n\n\n\n

Tres l\u00edneas en un certificado de an\u00e1lisis de HPEG 2400 hacen trabajo real: valor de hidroxilo, retenci\u00f3n de doble enlace y contenido de agua. El valor de hidroxilo es el m\u00e1s importante, porque es la medici\u00f3n de peso molecular con una unidad diferente. Las ventanas a continuaci\u00f3n provienen de la especificaci\u00f3n publicada de HPEG de Jiahua Chem, citada porque es p\u00fablica m\u00e1s que porque sea el grado que comprar\u00edas.<\/p>\n\n\n\n

Verif\u00edcalas contra el certificado que emite tu propio canal. HPEG 2400 llega a este mercado a trav\u00e9s de Kunlun, de PetroChina Jilin Petrochemical, y STL, de Lianyungang Petrochemical. Una ventana solo es vinculante si aparece en el documento de ese productor.<\/p>\n\n\n\n

L\u00ednea de especificaci\u00f3n<\/th>Ventana publicada<\/th>Lote reportado<\/th>Qu\u00e9 establece en el PCE terminado<\/th><\/tr><\/thead>
Valor de hidroxilo<\/td>40 a 25.40 mg KOH\/g<\/td>23.2<\/td>Longitud de la cadena lateral, por lo tanto densidad de injerto<\/td><\/tr>
Retenci\u00f3n de doble enlace<\/td>92% m\u00ednimo<\/td>98.97%<\/td>L\u00edmite m\u00e1ximo de macromon\u00f3mero que entra en la cadena principal<\/td><\/tr>
Contenido de agua<\/td>60% m\u00e1ximo<\/td>0.22%<\/td>Balance de agua de la carga acuosa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Divide 56100 por el valor de hidroxilo y esa ventana se resuelve en una cadena lateral de aproximadamente 2210 a 2620 g\/mol. El valor del lote de 23.2 equivale a aproximadamente 2418.<\/p>\n\n\n\n

As\u00ed que dos lotes ambos etiquetados como HPEG 2400 pueden diferir en alrededor de 400 g\/mol de cadena lateral y ambos estar dentro de la misma especificaci\u00f3n. Una ventana de especificaci\u00f3n de HPEG 2400<\/a> citada en mg KOH\/g vale m\u00e1s que un nombre de grado, y el certificado del lote vale m\u00e1s que la ventana.<\/p>\n\n\n\n

Alargar la cadena lateral no es la mejora obvia que parece. La revisi\u00f3n de Xinyi Li encontr\u00f3 tres posiciones incompatibles en la literatura: la longitud ayuda a la dispersi\u00f3n, la perjudica, o no existe una conexi\u00f3n clara. Ese desacuerdo es por lo que un formulador prueba un macromon\u00f3mero en lugar de calcularlo.<\/p>\n\n\n\n

C\u00f3mo copolimeriza HPEG 2400 con \u00e1cido acr\u00edlico<\/h2>\n\n\n\n

HPEG 2400 copolimeriza con \u00e1cido acr\u00edlico mediante polimerizaci\u00f3n radicalaria acuosa, con el doble enlace de metilo como restricci\u00f3n. La insaturaci\u00f3n al\u00edlica y met\u00e1lica es comparativamente poco reactiva en la propagaci\u00f3n radicalaria, por lo que la ruta convencional opera a 60 a 90 \u00b0C simplemente para lograr que el macromon\u00f3mero reaccione.<\/p>\n\n\n\n

El \u00e1cido acr\u00edlico y el macromon\u00f3mero tambi\u00e9n tienen relaciones de reactividad desiguales. La producci\u00f3n opera en modo semi-continuo con un perfil de adici\u00f3n dosificada, porque la velocidad de goteo es lo que fuerza la incorporaci\u00f3n del macromon\u00f3mero.<\/p>\n\n\n\n

La temperatura del reactor es una decisi\u00f3n del iniciador, no una propiedad del mon\u00f3mero que compras. La patente concedida de Anhui Conch CN108892753B opera HPEG-2400 a 30 \u00b0C con un par redox: persulfato de potasio y hidroper\u00f3xido de terc-butilo contra \u00e1cido L-asc\u00f3rbico y sulfato ferroso.<\/p>\n\n\n\n

Su primer ejemplo carga 260 g de HPEG-2400 y 100 g de HPEG-3000 contra 38 g de \u00e1cido acr\u00edlico, goteado durante tres horas. La reacci\u00f3n luego corre dos horas a 30 \u00b0C hasta 40% de s\u00f3lidos.<\/p>\n\n\n\n

\"Secuencia<\/figure>\n\n\n\n

Esa relaci\u00f3n de poli\u00e9ter a \u00e1cido, cercana a 10:1 en masa, es la parte para llevar a tu propia receta.<\/p>\n\n\n\n

El par redox compr\u00f3 la baja temperatura, no un goteo m\u00e1s corto.<\/p>\n\n\n\n

HPEG 2400 frente a macromon\u00f3meros TPEG y EPEG<\/h2>\n\n\n\n

A igual peso molecular nominal, HPEG necesit\u00f3 la mayor dosificaci\u00f3n de los tres. Ke y colaboradores en KZJ New Materials mantuvieron constantes las condiciones de s\u00edntesis en 2023 y ajustaron la dosificaci\u00f3n hasta que cada sistema alcanz\u00f3 un asentamiento igualado de 165 a 170 mm.<\/p>\n\n\n\n

Macromon\u00f3mero<\/th>Dosificaci\u00f3n (%)<\/th>Asentamiento (mm)<\/th>1 d\u00eda (MPa)<\/th>7 d\u00edas (MPa)<\/th>28 d\u00edas (MPa)<\/th><\/tr><\/thead>
HPEG-2400<\/td>0.53<\/td>165<\/td>16.8<\/td>33.9<\/td>50.0<\/td><\/tr>
TPEG-2400<\/td>0.48<\/td>170<\/td>17.0<\/td>33.6<\/td>51.7<\/td><\/tr>
EPEG-2400<\/td>0.43<\/td>170<\/td>18.2<\/td>35.6<\/td>52.2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Aproximadamente 23% m\u00e1s de HPEG que de EPEG compr\u00f3 la misma trabajabilidad, probado seg\u00fan GB 8076-2008 en un cemento P\u00b7O 42.5. La lectura del propio art\u00edculo fue que EPEG tiene mayor actividad de polimerizaci\u00f3n que TPEG y HPEG.<\/p>\n\n\n\n

La revisi\u00f3n de Xinyi Li apunt\u00f3 en la otra direcci\u00f3n, con IPEG y TPEG dispersando m\u00e1s d\u00e9bilmente que HPEG y compensando con retenci\u00f3n de asentamiento. Los n\u00fameros de Ke provienen de un solo paso de cribado dentro de una \u00fanica formulaci\u00f3n redox de resistencia temprana, por lo que ning\u00fan resultado resuelve el caso general.<\/p>\n\n\n\n

No sustituyas TPEG 2400<\/a> por HPEG a igual peso molecular sin recalificar la dosificaci\u00f3n. La qu\u00edmica de \u00e9ter vin\u00edlico detr\u00e1s de EPEG 3000<\/a> es una decisi\u00f3n separada, porque es lo que hace pr\u00e1ctico formular por debajo de 25 \u00b0C.<\/p>\n\n\n\n

D\u00f3nde se utiliza el superplastificante basado en HPEG<\/h2>\n\n\n\n
\"Hormig\u00f3n<\/figure>\n\n\n\n

El PCE basado en HPEG se utiliza en hormig\u00f3n estructural prefabricado, de mezcla lista y de alta resistencia como reductor de agua de alto rango. La norma ASTM C494 define esa clase en Am\u00e9rica del Norte; EN 934-2 es la contraparte europea.<\/p>\n\n\n\n

Los tipos F y G deben reducir el contenido de agua en al menos 12%, frente al 5% para los reductores de agua tipo A, D y E. La Asociaci\u00f3n Nacional de Hormig\u00f3n Prefabricado sit\u00faa el l\u00edmite superior pr\u00e1ctico por encima del 30% respecto a una mezcla de control.<\/p>\n\n\n\n

As\u00ed que las cifras del 30% al 35% con las que se comercializa el PCE basado en HPEG se sit\u00faan en dos o tres veces el m\u00ednimo del tipo F, como una afirmaci\u00f3n de clase m\u00e1s que una espec\u00edfica de HPEG.<\/p>\n\n\n\n

La arena manufacturada es donde un PCE tipo HPEG se vuelve costoso. \u00c9l y sus colegas modelaron las cadenas laterales del PCE contra la montmorillonita c\u00e1lcica utilizando teor\u00eda funcional de la densidad en 2024.<\/p>\n\n\n\n

Las cadenas laterales de HPEG a\u00fan se adsorb\u00edan favorablemente sobre la arcilla con grados de polimerizaci\u00f3n de 10 y superiores. Los tipos APEG e IPEG estudiados perdieron esa afinidad en el mismo rango.<\/p>\n\n\n\n

Debido a que el pol\u00edmero prefiere la arcilla sobre los productos de hidrataci\u00f3n, la dosis desaparece antes de que disperse nada. Alargar la cadena lateral no saca a un PCE tipo HPEG de eso, por lo que el agregado con alto contenido de finos sigue siendo un problema que el grado de macromon\u00f3mero no resolver\u00e1.<\/p>\n\n\n\n

Lo que Esto Significa en la Pr\u00e1ctica<\/h2>\n\n\n\n

Especifique HPEG 2400 por valor de hidroxilo y retenci\u00f3n de doble enlace, luego califique el lote en su propio reactor. El nombre del grado no lleva ning\u00fan n\u00famero.<\/p>\n\n\n\n

El macromon\u00f3mero es la mitad m\u00e1s barata de la decisi\u00f3n. El sistema iniciador y el perfil de adici\u00f3n mueven la dosis m\u00e1s que cambiar metaililo por isoprenilo.<\/p>\n\n\n\n

La pregunta honesta en una orden de compra no es si HPEG supera a TPEG. Es si su reactor obtiene el 98% de los dobles enlaces que pag\u00f3 en la cadena principal.<\/p>","protected":false},"excerpt":{"rendered":"

The 2400 in HPEG 2400 is a nominal figure, not a measurement. The line that pins the side chain is the hydroxyl value, and on published commercial specifications it spans a band about 18% wide. HPEG 2400 is methallyl alcohol polyoxyethylene ether: one polymerizable double bond at the head, roughly 53 ethylene oxide units behind […]<\/p>\n","protected":false},"author":4,"featured_media":1574,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1365","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"blocksy_meta":[],"acf":[],"yoast_head":"\nWhat Is HPEG 2400 Polycarboxylate Superplasticizer Monomer? - BASTONE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bastone-petrochem.com\/es\/hpeg-2400-polycarboxylate-superplasticizer-monomer\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is HPEG 2400 Polycarboxylate Superplasticizer Monomer? - BASTONE\" \/>\n<meta property=\"og:description\" content=\"The 2400 in HPEG 2400 is a nominal figure, not a measurement. The line that pins the side chain is the hydroxyl value, and on published commercial specifications it spans a band about 18% wide. 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The line that pins the side chain is the hydroxyl value, and on published commercial specifications it spans a band about 18% wide. 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